搭接工艺对选区激光熔化镍基单晶高温合金DD491晶体取向与微观组织的影响

张振武, 李继康, 许文贺, 沈沐宇, 戚磊一, 郑可盈, 李伟, 魏青松

Effects of Overlapping Process on Grain Orientation and Microstructure of Nickel-Based Single-Crystal Superalloy DD491 Fabricated by Selective Laser Melting

ZHANG Zhenwu, LI Jikang, XU Wenhe, SHEN Muyu, QI Leiyi, ZHENG Keying, LI Wei, WEI Qingsong

图6 不同扫描间距的多道搭接试样y-z面形貌的SEM像

Fig.6 SEM images of S1 (a1-a4), S2 (b1-b4), S3 (c1-c4), and S4 (d1-d4) multi-track overlapping samples in the y-z plane under 0.06 mm (a1-d1), 0.09 mm (a2-d2), 0.12 mm (a3-d3), and 0.15 mm (a4-d4) scanning hatches (Dotted lines indicate melt pool boundaries)